CN110383151A - glasses with wireless charging - Google Patents

Abstract

Glasses (100) include at least one eyeglass (110,120), lens frame (111,121), battery (170) and for the battery (170) wireless charging device, the wireless charging device includes receiver coil (181), is arranged to corresponding transmitter coils (340) remote power feeding by being located in individual charging equipment (300).The present invention is characterized in that, the receiver coil (181) is arranged such that it around one or several eyeglasses (110, at least one of 120), to form the lens frame (111,121) a part is closed in the lens frame (111,121) in, coil hole is also passed through there through the light of at least one eyeglass (110,120).

Description

glasses with wireless charging

technical field

The present invention relates to a pair of eyeglasses, and in particular to a pair of eyeglasses including a battery that can be charged via wireless inductive charging. Furthermore, the present invention relates to a holder and a charger for such glasses.

Background technique

Electric drive functions are increasingly used in a variety of apparel and accessories. Glasses, such as glasses or spectacles, are no exception. Such known functions of eyeglasses include, for example, automatic shading of the lenses. This electrical drive function may be implemented using analog circuits and/or digitally implemented electronic circuits. In both cases, a battery is usually required to power the circuit in question.

There is a problem with charging such batteries. In particular, connecting cables to glasses for charging is considered cumbersome, especially since glasses can have rather fine geometric dimensions. Therefore, it is difficult to connect such a cable for charging. Also, when not being worn, the glasses are often stored in places where such a cable-driven charger cannot be easily used, such as in a handbag. In addition, charging plugs are generally considered unsightly and limit the designer's freedom of design.

The present invention solves this problem.

SUMMARY OF THE INVENTION

Accordingly, the present invention relates to spectacles comprising at least one lens, a lens frame, a battery and means for wirelessly charging said battery, said wireless charging means comprising a receiver coil arranged such that Remotely powered by corresponding transmitter coils in separate charging devices. The spectacles are characterized in that the receiver coil is arranged to surround at least one of the one or more lenses to form part of the lens frame or to be enclosed in the lens frame, thereby passing through The light from the at least one mirror will also pass through the coil aperture (118e).

Furthermore, disclosed herein is a holder for glasses of the type described, the holder comprising a transmitter coil arranged to supply power to a corresponding receiver coil in the glasses, and the The holder includes alignment means arranged to align the glasses in a position allowing the receiver coil to be powered by the transmitter coil.

Description of drawings

Hereinafter, the present invention will be described in detail with reference to exemplary embodiments of the present invention and the accompanying drawings, wherein:

1 is a perspective view of an exemplary pair of eyeglasses in accordance with the present invention;

Figure 2 is a side view of the glasses shown in Figure 1;

Figures 3a, 3b and 3c are front views, respectively, of two different exemplary pairs of eyeglasses according to the present invention;

4 is a perspective view of an exemplary retainer;

Fig. 5 is a cross-sectional view of the holder shown in Fig. 4, the holder supporting a pair of glasses according to the present invention;

Figure 6 is a perspective view of the glasses of the present invention with a detachable protective device;

Figure 7 is a simplified plan view of a multilayer printed circuit; and

Figure 8 is a simplified illustration on a multilayer printed circuit with printed conduits.

Detailed ways

The figures share the same reference numerals for the same or corresponding parts. In conclusion, the statements made with respect to the pair of spectacles shown are equally relevant to the other pairs of spectacles described, if applicable. The same applies to the holders in FIGS. 4-5 with respect to each of the exemplary pairs of glasses.

The figures are simplified and generally not drawn to scale.

Thus, FIG. 1 shows a pair of eyeglasses 100 comprising two lenses 110 , 120 . According to the invention, the spectacles 100 comprise at least one such lens 110 , 120 . In Figure 3a, a pair of eyeglasses is shown with only one lens which, in use, covers both eyes of the user. However, it should be noted that the present invention may also be applied to other types of eyewear, such as welding masks, monocles, ski goggles, etc., which may feature one or more (usually no more than two) lenses.

Spectacles 100 also include two lens frames 111, 121, typically each surrounding the respective lens 110, 120 in question. Similar to the lenses 110, 120 themselves, it is appreciated that there may be one or more lens frames 111, 121.

Furthermore, the glasses 100 include a battery 170 arranged to power some electrical or electronic functions 190 used by the glasses 100 . Examples of such functions include automatic shading functions of the lenses 110, 120; sensor functions in the glasses 100 to sense some environmental parameters such as light or sound; built-in image viewing devices to display images to the user of the glasses 100 ,and many more. Importantly, this function relies on power from the battery 170, which is why the battery 170 needs to be charged.

To this end, the glasses 100 also comprise battery charging means 180 , and in particular means 180 for wirelessly charging the battery 170 . The wireless charging device 180 comprises an inductive receiver coil 181 arranged to be powered remotely by a corresponding transmitter coil 340 located in a separate charging device (see FIGS. 4 and 5 ), eg for the holder 300 of the glasses 100 form.

According to the invention, the receiver coil 181 is arranged such that it surrounds at least one of the one or several lenses 110, 120 to form part of the respective lens frame 111, 121 in question or to be enclosed within the discussed In the respective lens frame 111, 121, light thereby passing through the at least one lens 110, 120 will also pass through the coil aperture.

That is, the inventors have realised that by arranging the receiver coil around one or both lenses of a pair of eyeglasses, especially in the preferred case of a pair of spectacles or goggles, a sufficiently strong induction can be provided The coil is so as to be able to generate a charging voltage sufficient to charge the battery 170 by the transmitter coil 340 as described herein. There are many ways to do this, as described below.

It should be noted that the coil typically includes one or more "coil holes". The term means the main through hole through the coil around which all coil turns extend and are defined. This is also what the term "around" refers to - each coil turn extending around the perimeter of such a coil hole or holes.

It should also be noted that not all light passing through the one or more lenses 110, 120 must pass through this coil aperture. Preferably, however, at least half, preferably substantially all, of the light passing through the one or more lenses 110, 120 also passes through the coil aperture. This can be achieved by an arrangement of coils in the plane of the lenses 110, 120, at or near the periphery of the lenses, or in the sense that the circumferences of the lenses 110, 120 are cylindrical cross-sections Arranged generally along the envelope surface defined by this cylinder defined by the lenses 110, 120 in question.

In the case of a metal coil, the coil turns may be wound around the one or more lenses 110, 120 in question. In the case of a printed circuit, the coil turns may be printed in sequence in the structure surrounding the one or more mirrors 110 , 120 .

Generally, it is preferred that the receiver coil 181 comprises at most 30, preferably at most 20, preferably at most 18 individual turns 181a. Furthermore, it is preferred that the number of these turns 181a is at least 5, preferably at least 10, preferably at least 14. Such a number of turns has proven sufficient to power a rechargeable battery while still minimizing the overall volume of the receiver coil 181 . This is important for the presence of the coil 181 without compromising the design and/or function of the glasses.

With regard to the cross-sectional area of coil conductor 181b, it is recognized that conductor 181b may comprise a single thread or cable for each turn, or alternatively, several smaller conductive strands may be arranged in parallel to form each turn (eg, , in the so-called Litz wire, which consists of several individual wires arranged in parallel, together forming each turn). Regardless of the number of these individual strands or wires, it is preferred that the total of a set of at least one coil conductors (ie, a single conductor or a set of parallel conductors) forming each individual turn in the receiver coil The cross-sectional area is at most 0.03 mm ² , preferably 0.02 mm ² . Furthermore, it is preferred that said total cross-sectional area per turn is at least 0.005 mm ² , preferably at least 0.01 mm ² .

In practice, however, the number of turns and total cross-sectional area depend on the voltage required to charge the battery; the power available from the transmitter coil 340; the resistance of the coil 181 conductor material, and the like. Generally, it is preferred that the inductance of the coil 181 be between 5 and 20 μH.

Preferably, the battery 170 is a lithium ion battery, which requires at least about 4V or slightly more for charging, which is preferred because when the receiver coil 181 is activated for use in the same position as the powered transmitter coil 340 Such voltages are available from the receiver coil 181 upon charging with a predetermined geometry, and all parts of the glasses 100 and transmitter 300 are sized and arranged to allow such voltages to be generated during charging.

In general, preferred materials for the conductors of the receiver coil 181 include various metals, such as stainless steel, copper or copper alloys, and silver; carbon materials; and conductive polymers, preferably such polymers that are flexible.

Furthermore, it is preferred that the receiver coil 181 forms part of the lens frame 111 , 121 or is enclosed by the lens frame 111 , 121 . Regardless of whether the receiver coil 181 is completely enclosed by the lens frame 111 , 121 , it is preferred that the aggregate cross-section of both the lens frame 111 , 121 and the receiver coil 181 at the thinnest point along the receiver coil 181 is no greater than 6 by 6mm. Furthermore, it is preferred that the lenses 110, 120 are not flat, but curved around at least one, preferably two, axes of curvature, and the lens frames 111, 121 are correspondingly non-flat. Therefore, the receiver coil 181 is preferably non-planar, in the sense that it does not extend in a plane. This is most often required in the application of spectacles or goggles such as reading glasses or sunglasses. In various embodiments of the present invention, even with such a non-flat receiver coil 181, the battery 170 can be efficiently charged wirelessly.

According to a preferred embodiment, the conductors 181a forming the turns of the receiver coil 181 are metal wires, such as round steel wires or copper wires. In a preferred embodiment, in addition to being arranged to receive inductively transferred electrical energy from the transmitter coil 340 , the receiver coil 181 also forms the basic structural stability element of the eyewear 100 . This means that, without the receiver coil 181, the glasses 100 do not have sufficient mechanical stability, eg bending resistance, for normal intended use. For example, the receiver coil 181 may be encapsulated by a thin layer of plastic, whereby the receiver coil 181 forms the main structural element of the lens frame 111, 121, providing mechanical stability to the frame 111, 121, while the plastic layer protects the receiver coil 181 and provide the desired aesthetic appearance. Another example is that the receiver coil 181 forms the visible part of the lens frame 111, 121, if this is desired from an aesthetic point of view. The individual receiver coil 181 conductors can be isolated as desired.

However, according to another alternative preferred embodiment, the conductors 181b forming the turns of the receiver coil 181 are printed on the multilayer circuit 181c which in turn is mounted in or on the glasses 100 as a whole part. For example, such circuitry 181c may be glued between the two layers of the frame 111 , 121 or encapsulated by a plastic material during the manufacturing process of the frame 111 , 121 .

The expression "multilayer circuit" herein refers to a circuit, such as a circuit board, 181c having more than one layer of conductors, wherein the layers are interconnected. Thus, each such layer also comprises one or several of said receiver coil turns 181a, and each layer is interconnected with one or several of its adjacent layers so as to form a connected receiver coil 181 . See Figure 9 as an example.

Such multi-layer circuits 181c are conventional in their own right and will not be described in detail herein. It should be noted, however, that the substrate of such circuitry 181c may be a rigid material including, for example, fiberglass material. In this case, the circuit 181c may form a stabilizing element having a function corresponding to the function described above in terms of providing the basic structural stabilizing element of the glasses 100 .

However, in a preferred embodiment, the circuit 181c is a multilayer flexible printed circuit (FPC), in other words a printed multilayer circuit, which is printed on a flexible substrate such that the resulting circuit is flexible. Such multilayer flexible printed circuits may also be or include so-called flat flexible cables (FFC) and/or so-called rigid-flex cables. It is important that the circuit is at least partially flexible. Suitable substrate materials include films of polyester, polyamide, polyethylene naphthalate, polyetherimide, and fluoropolymers and copolymers. Such flexible printed circuits are well known per se and are used, for example, in digital cameras and computer keyboards.

For such a flexible multilayer circuit 181c, it is preferred that each individual conductor 181b has a cross-section of 0.02 to 0.05 mm thick and 0.1 to 2 mm wide, preferably 0.1 to 0.6 mm wide. One preferred arrangement for receiver coil 181 conductors 181b is to have at least four layers 181d, with at least four conductors 181b on each such layer, to form receiver coil 181 . This is shown in FIG. 8 . Preferably, there are less than 10 layers that carry receiver coils 181 .

Using the present invention, it is possible to provide a receiver coil 181 even in cases where the lens frames 111, 121 have a local radius of curvature of between 550-50mm (which is preferred) along the length of the receiver coil 181 (the receiver coil 181 along the frame 111, 112), the receiver coil 181 can also be used for efficient wireless charging. It should be noted that the lenses 110, 120 themselves may also have some curvature, which may be a curvature other than that of the lens frames 111, 121 in question.

In particular, when rigid or flexible printed circuits 181c are used, it is preferred that the lens frame 111, 121 curvature approximate the use of a set of straight line segments between 1 and 5 mm in length, which simplifies the design and manufacturing process.

Generally, and especially for the flexible printed circuit 181c, it is preferred that the battery charging device 180 includes a circuit 182 for supplying the battery 170 with a desired voltage. In addition, as described above, the glasses 100 also include circuitry 190 for performing other tasks (ie, additional functions). Preferably, such circuits 182 , 190 are arranged in the temples 130 or different temples 130 , 140 of the glasses 100 such that the flexible printed circuits extend beyond the respective hinges 150 , 160 of the glasses 100 . In this way, the flexible printed circuit can extend from the respective lens frame 111, 121 to the respective temple 130, 140 in one piece, beyond the hinges 150, 160 without the use of connectors etc., and even when the hinges 150, 160 When bent at different angles, the flexible printed circuit still enables electrical connection and power delivery across the hinges 150, 160. This provides for very low cost eyeglass production while still maintaining complete flexibility in the functional and geometric arrangement of the various components 170, 180, 190 on the temples 130, 140. As mentioned above, this flexible printed circuit 181c can also be designed so as to provide sufficient charging power while still not becoming too large to fit as part of the lens frame 111, 121.

A simplified plan view of the outline of an exemplary single flexible printed circuit 181c is shown in FIG. 7 .

An exemplary arrangement of components is shown in FIG. 1 , wherein the battery 170 is arranged in one of the temples 140 and the additional circuit 190 is arranged in the other temple 130 . A battery charging circuit 182 is also arranged in the other temple 130 . All of these components 170, 182, 190 are then spanned across two via one or several flexible printed circuits of the type described above (preferably a single such flexible printed circuit, which can be inexpensively installed in a single step during manufacture of the glasses 100). The hinges 150, 160 are electrically interconnected.

According to a preferred embodiment, the wireless charging device 180 further comprises digital control means, which may be the same as the battery charging circuit 182, arranged to control the power, current and/or voltage generated in the receiver coil 180. Furthermore, the digital control means is preferably also arranged to: by modulating said power, current, voltage and/or frequency in a way that can be detected remotely by the transmitter coil 340 and the associated circuitry in the charging device 300, to adjust the relation to the glasses Information about the state of the battery 100 and in particular about the current state of charge of the battery 170 is sent digitally to the transmitter coil 340 . Therefore, in this case, there is digital communication from the glasses 100 to the charging device 300 using a predetermined format and protocol, such as sending a signal that the battery 170 is fully charged. Examples of such communication standards include those specified by the Qi standard for wireless charging.

Furthermore, Figures 3a-3c show different preferred arrangements of receiver coils 181 in the case where the glasses 100 are a pair of spectacles or goggles.

In Figure 3b the receiver coil 181 is arranged as two separate but preferably electrically interconnected coils around two different lenses 110,120. In this case, the coils 181 may provide separate induced voltages to the battery charging circuit 182 arranged to be inductively activated by two corresponding distinct transmitter coils 340, or together form a single coil.

In Figure 3a, the receiver coil 181 is arranged as a single coil which surrounds the two lenses 110, 120 in a non-overlapping manner (no coil 181 conductors 181b crossing). In fact, in Figure 3a, the lenses 110, 120 are really just one interconnected lens, the coil 181 surrounds part of the lens frame 111, 121, correspondingly a single lens frame surrounds at least part of the single lens.

In Fig. 3c, the receiver coil 181 is arranged as a single coil, which surrounds the two mirrors 110, 120 in a figure-eight shape, wherein the coils overlap between the two different mirrors 110, 120.

It should be noted that other examples are possible, such as a single lens with two coils, where the central frame member component covers portions of the coils (and corresponding portions of the common lens). In addition, Figure 3c can also use such a central frame part, so that a single lens can be used in a figure-eight shape.

In these and other cases, it is preferred that the or each receiver coil 181 has a circumference of between 100 and 400 mm.

Figure 6 shows another preferred embodiment according to which the eyeglasses 100 comprise a removable protective device 101 arranged to be removably connected to the eyeglasses 100, eg using A flap is attached to the eyeglass 100 such that it surrounds at least one, preferably both, lenses 110 , 120 . Where the spectacles 100 have only one lens, this lens is then surrounded accordingly. Preferably, the removable protector 101 covertly covers the lenses 110, 120 in question, so that the overall shape of the eyeglasses 100 is not substantially affected by the protector 101 being mounted thereon. Furthermore, the removable protection device 101 comprises a material with a high initial permeability, suitable for 100-130 kHz applications, eg an initial magnetic value between 2000-3000 Hm- ¹ (preferably between 2300-2500 Hm ^-1 ) conductivity to provide electrical shielding to the receiver coil 181 . Preferably, the shielding comprises a magnetic layer, such as ferrite, arranged along the lenses 110, 120 in question when surrounded by the protective device 101, which increases the charging efficiency and protects the electrons in the glasses 100 during charging The device and external metallic objects placed close to the charging circuit are protected from thermal stress due to eddy currents within the metallic material. The layer may comprise a layer of magnetic powder, such as ferrite powder. In addition, the layers may also include layers of non-magnetic metal foils, such as aluminum foils. In this way, the necessary electrical shielding in compliance with existing wireless charging standards, such as the Qi standard described above, can be achieved by the detachable protective device 101, and the protective device 101 is preferably mounted on the glasses 100 when the glasses 100 are being charged. Instead, such shielding is not required on the lens frames 111 , 121 themselves, providing more design freedom for the glasses 100 . This is the preferred situation.

In particular, when the glasses 100 are not used, the protection device 101 can also be used only for the protection of the lenses 110 and 120 . Therefore, it is preferred that the protective device 101 is not arranged to cover one or more temples 130 , 140 , but only to cover both sides of the lenses 110 , 120 and the lens frames 111 , 121 .

Preferably, the protection device 101 is fully electrically passive, in the sense that the protection device 101 is not powered by an internal or external power source.

It should be noted that such a protection device 101 can also be sold separately.

FIGS. 4 and 5 show the above-described charging device in the form of a holder 300 for eyeglasses 100 . It should be noted that the glasses 100 are specially designed to be held by the holder 300 and wirelessly charge while being held, and/or that the holder 300 is specially designed to hold the glasses 100 therein and to be suitable for The glasses 100 are wirelessly charged.

The holder 300 includes a transmitter coil 340 arranged to supply power to the corresponding receiver coil 181 in the glasses 100 . As mentioned above, depending on the situation, several transmitter coils may be arranged to power several corresponding receiver coils. Furthermore, the holder 300 comprises alignment means 330 arranged to align the glasses in a position that allows the receiver coil 181 to be powered by the transmitter coil 340 . Such alignment means 330 may be in the form of a receiving space 360 within a holder 300 that is sufficiently small and shaped so as not to allow the glasses 100 to be wirelessly charged when the glasses 100 are received in the holder 300 way to be oriented. Preferably, however, specific internal geometric details within the accommodation space 360 are designed to correspond to specific external geometric details of the eyeglasses 100, eg around where the two lens frames 111, 121 contact on the eyeglasses 100, so that the retention It is not possible for the holder 300 to fully accommodate the glasses 100 unless the glasses are properly oriented in the holder 300 . For this purpose, it is also preferred that the holder 300 can be opened and closed, eg using a lid 310 with a hinge 320, which cannot be fully closed unless the glasses are properly oriented in the holder 300.

This allows the transmitter coil 340 to be very precisely oriented relative to the receiver coil 181 when the glasses 100 are housed in the holder 300, thereby providing a prerequisite for efficient, low loss charging.

Preferably, the holder 300 is arranged to apply alternating current through the transmitter coil 340 during charging.

Typically, the holder 300 may be a spectacles or goggle case arranged to store the spectacles or goggles 100 when the glasses are not in use, and at the same time double as a charging station.

Holder 300 includes a power source 350, which may include or be connectable to a wall socket connector, transformer, or the like. It is also preferred that the power source 350 includes a battery so that the holder 300 does not have to be connected to a wall outlet in order to charge the glasses 100 . The battery of the holder 300 preferably has at least twice, preferably at least five times the capacity of the battery 170 of the glasses 100 .

With regard to the alignment means 330 , these preferably also comprise activation means 331 arranged to be activated when the glasses 100 are correctly positioned for charging in the holder 300 . The activation means 331 may for example be in the form of a mechanical operating button which is pressed as the lid 310 is closed (with the glasses 100 being accommodated in the holder 100). Alternatively, the activation means 331 may comprise a broken circuit arranged such that the broken circuit is arranged on the eyeglasses 100 when the eyeglasses 100 are positioned in the holder 100 in the correct orientation A corresponding electrical connector shortcut, or a combination of these and/or any number of such conventional options for this purpose. The holder 300 is then arranged to automatically initiate wireless charging of the glasses 100 in response to the activation means 331 being activated.

It should be noted that the receiver coil 181 is never in direct electrical contact with the transmitter coil 340 or the power source 350 of the holder 300, and all charging of the battery 170 of the glasses 100 is always done wirelessly.

In Figure 4, the holder 300 is shown in an open state. In FIG. 5 , the holder 300 is shown in cross section during wireless charging of the glasses 100 with the glasses 100 in the correct charging orientation within the holder 300 .

In particular where the holder 300 includes the cover 310, it is preferred that the holder 300 is arranged to accommodate the glasses 100 in the correct charging orientation, in which the front of the glasses is The lens side 110c (the side of the lens facing away from the user's eye during normal use) faces the inner side 311 of the cover 310 . Then, the transmitter coil 340 is arranged in the cover 310 such that: when the glasses 100 are housed in the holder 300 and the cover 310 is fully closed, the transmitter coil 340 is arranged at a distance of at most 1 cm, preferably at most 0.6 cm from the receiver coil 181 distance and substantially parallel to the receiver coil 181 .

Above, the preferred embodiment has been described. However, it will be apparent to those skilled in the art that many modifications may be made to the disclosed embodiments without departing from the basic idea of the invention.

For example, in addition to the frame glasses shown in the figures, the present invention can be applied to many types of glasses, and the wireless charging function can also be provided for many different designs of frame glasses according to the present invention.

Furthermore, the glasses described herein may also be arranged for wireless or wired charging using other devices than the described holder 300 and flat surface Qi charger.

Therefore, the invention is not limited to the described embodiments, but may vary within the scope of the appended claims.

Claims (15)

1. Spectacles (100) comprising at least one lens (110, 120), a lens frame (111, 121), a battery (170) and a device for wirelessly charging the battery (170), the The wireless charging device comprises a receiver coil (181) arranged to be powered remotely by a corresponding transmitter coil (340) located in a separate charging device (300), the receiver coil (181). 181) is arranged such that it surrounds at least one of said one or several lenses (110, 120), forms part of said lens frame (111, 121) or is enclosed in said lens frame (111, 121), thereby wearing Light passing through the at least one mirror (110, 120) will also pass through the coil hole (118e), characterized in that the receiver coil (181) comprises 5 to 30 turns (181a), and in that the receiver coil (181) is formed The total cross-sectional area of a set of at least one coil conductor ( 181 b ) for each individual turn ( 181 a ) in the coil ( 181 ) is between 0.005 mm ² and 0.03 mm ² . 2. Spectacles (100) according to claim 1, characterized in that the receiver coil (181) comprises a maximum of 20, preferably a maximum of 18 turns (181a), and in that the receiver coil (181a) is formed. The total cross-sectional area of a set of at least one coil conductor ( 181 b ) for each individual turn ( 181 a ) in 181 ) is at most 0.02 mm ² . 3. Spectacles (100) according to claim 2, characterized in that the receiver coil (181) comprises at least 10, preferably at least 14 turns (181a), and in that the receiver coil (181a) is formed The total cross-sectional area of the set of at least one coil conductor ( 181 b ) for each individual turn ( 181 a ) in 181 ) is at least 0.01 mm ² . 4. Spectacles (100) according to any of the preceding claims, characterized in that the conductor (181b) forming the turn (181a) of the receiver coil (181) is a wire, except by In addition to being arranged to receive the inductively transmitted electrical energy from the transmitter coil (340), it also forms a basic structural stabilizing element of the glasses (100). 5. Spectacles (100) according to any of the preceding claims, characterized in that the conductors (181b) forming the turns (181a) of the receiver coil (181) are printed on a multilayer printed circuit (181c), which in turn are mounted in the glasses (100). 6. Spectacles (100) according to claim 5, characterized in that each layer of the printed circuit (181c) comprises several turns (181a) of the receiver coil (181). 7. Spectacles (100) according to claim 6, characterized in that the printed circuit (181c) comprises at least four layers (181d) with at least four conductors (181b) on each layer forming the receiver Coil (181). 8. The glasses (100) according to claim 6 or 7, wherein the printed circuit (181c) is a flexible printed circuit (FPC). 9. Spectacles (100) according to claim 8, wherein each individual conductor (181b) is 0.02 to 0.05 mm thick in cross section and 0.1 to 2 mm wide, preferably 0.1 to 0.6 mm wide width. 10. The glasses (100) of claim 9, wherein the glasses (100) comprise circuitry (180, 190) for supplying a desired voltage to the battery (170) and/or for performing other tasks , and the circuits (180, 190) are arranged in the temples (130, 140) of the glasses (100) such that the flexible printed circuit (181c) extends past the hinges (150, 160) of the glasses (100). 11. Spectacles (100) according to any one of the preceding claims, wherein the wireless charging means further comprises digital control means arranged to control the receiver coil ( 181) and is further arranged for sending information about the state of the glasses (100) to the glasses by modulating the power, current, voltage and/or frequency Transmitter Coil (340). 12. The spectacles (100) according to any one of the preceding claims, characterized in that the spectacles (100) are a pair of frame spectacles. 13. Spectacles (100) according to claim 12, characterized in that the receiver coil (181) is arranged around one or preferably two different lenses (110, 120) of the spectacles (100) two separate coils; a single coil arranged to surround both lenses (110, 120) in a non-overlapping manner; or a single coil arranged to surround both lenses (110, 120) in a figure 8, wherein the coils are Overlap between two different lenses (110, 120). 14. Spectacles (100) according to any of the preceding claims, characterized in that the glasses (100) comprise detachable protective means (101 ) which are arranged Removably connected to the glasses (100) such that it surrounds the lenses (110, 120), and in that the removable protector (101) provides electrical shielding to the receiver coil (181). 15. The glasses (100) according to claim 14, wherein the detachable protective device (101) does not cover the temples (130, 140) of the glasses (100) when connected.